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A control method for coaxial counter-rotating propeller propulsion system

A technology of counter-rotating propeller and propulsion system, applied in electrical control, engine control, fuel injection control, etc., can solve problems such as difficulty in ensuring the real-time performance of the control system

Active Publication Date: 2021-09-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to solve the problem that it is difficult to ensure the real-time performance of the control system while optimally controlling the overall efficiency of the counter-rotating propeller and the engine in the coaxial counter-rotating propeller propulsion system, a method based on the combination of offline optimization database and online real-time efficiency optimization is proposed. Coaxial counter-rotating propeller propulsion system control method

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0013] specific implementation plan

[0014] Technical solutions:

[0015] (1) Constructing an off-line database of CRP efficiency and thrust with respect to forward ratio, front pitch angle and rear pitch angle

[0016] Using numerical simulation calculations, ground test results can also be used to construct the off-line database 1 of the efficiency and thrust of the counter-rotating propeller with respect to the forward ratio, front pitch angle and rear pitch angle; use the test data to construct the off-line database of the engine efficiency with respect to torque and speed Database two; offline database one and offline database two are stored in the aircraft on-board control system;

[0017] (2) Clarify the relationship between the front pitch angle and the rear pitch angle that makes the efficiency of the counter-rotating propeller optimal under different propulsion ratios

[0018] The method is used for online search, and the method of constructing the database combin...

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Abstract

This patent constructs and optimizes the off-line optimization database for the efficiency of the counter-rotating propeller system, and on this basis, combines the online optimization algorithm to calculate the speed and nominal pitch angle that make the overall efficiency of the counter-rotating propeller propulsion system optimal. Finally, the The speed closed-loop control fine-tunes the pitch angle to meet the actual flight conditions. On the basis of ensuring the optimal overall efficiency of the counter-rotating propulsion system, this patent improves the real-time performance and makes it easier to improve the real-time performance of the control of the counter-rotating propulsion system.

Description

technical field [0001] The invention belongs to the field of propeller control, in particular to a method for controlling a coaxial counter-rotating propulsion system. Background technique [0002] The coaxial counter-rotating propeller propulsion system is mainly composed of two coaxial counter-rotating propellers and an engine system that can independently control the collective pitch. The interaction mechanism and coupling law of the front and rear blades of the coaxial counter-rotating propeller are very complicated. The pitch matching of the front and rear blades not only affects the aerodynamic efficiency of the propeller system and the fuel efficiency of the engine, but also causes the blade fatigue due to the periodic aerodynamic load between the propellers. , Long-term flight may cause the blade to break. Therefore, the accuracy and real-time requirements for the pitch matching of the two blades and the execution of the control system are very strict. At present, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C27/10B64C27/12B64D31/00F02D41/14
CPCB64C27/10B64C27/12B64D31/00F02D41/1405F02D41/1406
Inventor 杨骁王向阳朱纪洪袁夏明和阳
Owner TSINGHUA UNIV